JERUSALEM, Israel - Following Cairo's arrest last week of 49 members of a Hezbollah terror cell operating in Egypt, the IDF (Israel Defense Forces) tightened security along the borders with Egypt and Jordan.

Egypt has also tightened its security forces deployed at the border as the search for additional members of the Hezbollah terror cell -- some of whom may be hiding out with Bedouin families in the Sinai Peninsula -- continues.

On Wednesday, Egyptian security forces discovered nearly 2,000 pounds of explosives near the border with the Gaza Strip and arrested three Palestinians for attempting to enter Egypt illegally.

IDF special forces deployed along the borders are on high alert for infiltration and kidnapping attempts not only by Hezbollah operatives, but also by Hamas, Islamic Jihad and other Islamic terror groups trying to enter Israel from Egypt and Jordan.

Particularly vulnerable is Israel's southernmost resort city of Eilat, which is in close proximity to the Taba border crossing to Red Sea resorts in the Egyptian Sinai, a favorite tourist destination for Israelis. From 2005 to 2007, 125 people vacationing at hotels in Taba were killed in bombing attacks.